Indefinite pronouns are words that replace nouns; they refer to an identifiable but not specified person or thing, expressing the idea of all, none, any or some. 不确定代词可以替代名词。他们可以让不确定的人或物表达所有人、没有人或某些人的想法。
Indefinite article: used to indicate that a thing is not identified as unique. 不定冠词:用于指定不特定不唯一的东西。